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Aquatic insects have developed freeze tolerance much like their terrestrial counterparts. However, freeze avoidance is not an option for aquatic insects as the presence of ice in their surroundings may cause ice nucleation in their tissues. [15]: 148 Aquatic insects have supercooling points typically around −3º to −7 °C.
Freezing of the head and thorax in other insects tends to have adverse effects on neural tissue, so it is not surprising that these protective mechanisms have been observed in certain species, but E. nugatoria is the only insect known to semi-freeze through the winter. By allowing the abdomen to freeze, evaporative water loss is reduced over ...
It is an immobile state most often triggered by a predatory attack and can be found in a wide range of animals from insects and crustaceans to mammals, birds, reptiles, amphibians, and fish. [1] [5] [2] Apparent death is separate from the freezing behavior seen in some animals. [1] [2]
For terms see Morphology of Diptera.Chloropidae are minute to small (1.0 to 4.0 mm), rarely medium-sized, flies (6.0 to 9.0 and 12 mm) They are either black, gray, yellow, or greenish and the mesonotum often has a pattern of three to five dark longitudinal stripes against a light-colored background.
Their eyes are either missing or reduced and they have no ocelli (simple eyes). [2] Their closest living relatives are the recently discovered Mantophasmatodea. [3] Most species are less than 3 cm long, the largest being Namkungia magnus. [4] The family has its own order, Grylloblattodea (sometimes considered a suborder of Notoptera [1]). It ...
Compound eye of Antarctic krill as imaged by an electron microscope. A compound eye is a visual organ found in arthropods such as insects and crustaceans.It may consist of thousands of ommatidia, [1] which are tiny independent photoreception units that consist of a cornea, lens, and photoreceptor cells which distinguish brightness and color.
The stalked eyes are usually sexually dimorphic, with eyestalks present but shorter in females. [3] The stalk-eyed flies are up to a centimeter long, and they feed on both decaying plants and animals. Their unique morphology has inspired research into how the attribute may have arisen through forces of sexual selection and natural selection.
The name pinacate is Mexican Spanish, derived from the Nahuatl (Aztec) name for the insect, pinacatl, which translates as "black beetle". [ 3 ] Eleodes species range from about 10 to 50 millimetres (0.39 to 1.97 in) in length [ 2 ] and are black in color with some having a reddish tint on their abdomen.